[Bug target/55194] New: h8300 ICE during conftest in libgcc dwarf2out:7605

[Bug target/55194] New: h8300 ICE during conftest in libgcc dwarf2out:7605

[joel at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

             Bug #: 55194
           Summary: h8300 ICE during conftest in libgcc dwarf2out:7605
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: joel@gcc.gnu.org


When building newlib using the gcc-svn head, the compiler generates assembly
language that cannot be assembled by the binutils cvs head or 2.22

xgcc (GCC) 4.8.0 20121103 (experimental) [trunk revision 193124]

This is enough to trip the bug:

/home/joel/v850/tools/b-gcc-svn/./gcc/xgcc
-B/home/joel/v850/tools/b-gcc-svn/./gcc/ -c -O2 -g h8300_bug.c 

Dropping the -g is sufficient to let it compile.

Test case is very basic:

int main(int argc, char **argv)
{
  return 0;
}

The full command line:

configure:3374:  /home/joel/v850/tools/b-gcc-svn/./gcc/xgcc
-B/home/joel/v850/tools/b-gcc-svn/./gcc/ -nostdinc
-B/home/joel/v850/tools/b-gcc-svn/h8300-rtems4.11/newlib/ -isystem
/home/joel/v850/tools/b-gcc-svn/h8300-rtems4.11/newlib/targ-include -isystem
/home/joel/v850/tools/gcc-svn/newlib/libc/include
-B/home/joel/v850/install/h8300-rtems4.11/bin/
-B/home/joel/v850/install/h8300-rtems4.11/lib/ -isystem
/home/joel/v850/install/h8300-rtems4.11/include -isystem
/home/joel/v850/install/h8300-rtems4.11/sys-include    -o conftest -g -O2  
conftest.c  >&5
conftest.c:16:1: internal compiler error: in value_format, at dwarf2out.c:7605
 }
 ^
0x8266d9f value_format
        ../../gcc-svn/gcc/dwarf2out.c:7605
0x8284966 output_value_format
        ../../gcc-svn/gcc/dwarf2out.c:7618
0x8284966 output_abbrev_section
        ../../gcc-svn/gcc/dwarf2out.c:7651
0x8284966 dwarf2out_finish
        ../../gcc-svn/gcc/dwarf2out.c:22527

[Bug target/55194] h8300 ICE during conftest in libgcc dwarf2out:7605

[joel at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

--- Comment #1 from Joel Sherrill <joel at gcc dot gnu.org> 2012-11-03 17:07:01 UTC ---
Sorry... bad cut and paste. The assembly is OK. The cross compiler generates an
ICE.

[Bug target/55194] h8300 ICE during conftest in libgcc dwarf2out:7605

[joel at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

--- Comment #2 from Joel Sherrill <joel at gcc dot gnu.org> 2012-11-04 06:20:02 UTC ---
git bisect should help:

[0e797c2e325bfe0676fc9b9e5baee01aefb164f5] /cp 2012-08-20  Paolo Carlini 
<paolo.carlini@oracle.com>
[joel@baltimore gcc]$ git bisect good
Bisecting: 1 revision left to test after this (roughly 1 step)
[29b2949ccfc068c78899358ca40218f3518b00dd]     PR rtl-optimization/54294     *
fwprop.c (all_uses_available_at): Ignore debug insns in between     def_insn
and target_insn when checking whether the shortcut is     possible.
[joel@baltimore gcc]$ git bisect good
Bisecting: 0 revisions left to test after this (roughly 0 steps)
[2bf99680c2012de150798c933642aa4c82a85410] 2012-08-20  Tobias Burnus 
<burnus@net-b.de>

[Bug target/55194] h8300 ICE during conftest in libgcc dwarf2out:7605

[joel at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

--- Comment #3 from Joel Sherrill <joel at gcc dot gnu.org> 2012-11-04 06:22:22 UTC ---
I added Jakub because I think this was the patch which broke it:


Author: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Mon Aug 20 18:56:49 2012 +0000

        PR rtl-optimization/54294
        * fwprop.c (all_uses_available_at): Ignore debug insns in between
        def_insn and target_insn when checking whether the shortcut is
        possible.

[Bug target/55194] h8300 ICE during conftest in libgcc dwarf2out:7605

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-05 11:11:32 UTC ---
Author: jakub
Date: Mon Nov  5 11:11:28 2012
New Revision: 193158

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193158
Log:
    PR target/55194
    * dwarf2out.c (value_format) <case dw_val_class_high_pc>: Handle
    also DWARF2_ADDR_SIZE 1 and 2.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/dwarf2out.c

[Bug target/55194] h8300 ICE during conftest in libgcc dwarf2out:7605

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55194

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.8.0

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-05 11:16:47 UTC ---
Off by two guess, the change that broke this was r190543, my patch was r190541.
Anyway, should be fixed, though haven't tested it.